Script Instagram Unfollow yang tidak MengFollow

<?php
@ini_set("output_buffering", "Off");
@ini_set('implicit_flush', 1);
@ini_set('zlib.output_compression', 0);
@ini_set('max_execution_time',1000000);
header( 'Content-type: text/html; charset=utf-8' );
include 'akun.php';
include 'API.php';
echo "Mengambil list yang tidak follback anda...<br/>";
notFollback();
function notFollback($next_max_id = null, $i = 1)
{
    global $agent, $ID;

    $action = 'following';
    $following = SendRequest('friendships/'.$ID.'/'.$action.'?max_id='.$next_max_id, false, false, $agent, true);
    $obj = json_decode($following[1]);
    @$max_id = $obj->next_max_id;
    foreach ($obj->users as $users) {
        $user_id = $users->pk;
        $username_ = $users->username;
        $check = SendRequest('friendships/show/'.$user_id.'/', false, false, $agent, true);
        $cek = json_decode($check[1]);
        if ($cek->followed_by == false) {
            echo $i . ". @" . $username_ . " belum follback<br/>";
            $action = 'destroy';
            $data = '{"user_id":"'.$user_id.'"}';
            $sig = GenerateSignature($data);
            $new_data = 'signed_body='.$sig.'.'.urlencode($data).'&ig_sig_key_version=4';
            $follow = SendRequest('friendships/'.$action.'/'.$user_id.'/', true, $new_data, $agent, true);
            $obj2 = json_decode($follow[1]);
            if ($obj2->status == "ok") {
                echo "-- Mengunfollow @" . $username_ . " Sukses<br/>";
                sleep(1);
            }
            $i++;
            flush();
            ob_flush();
        } else {
            echo "@" . $username_ . " saling follow<br/>";
            flush();
            ob_flush();
        }
    }
    if($max_id) {
        notFollback($max_id, $i);
        exit();
    }
    $i--;
    echo "$i yang belum follback sudah di unfollow<br/>";
}
echo "Adek Lelah... Sudah dulu bang<br/>";


___ITCrews.blogspot.com ft AT998.blogspot.com____